EP.48 Dosage of Death

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Pharmaceutical Calculations

A patient is prescribed amoxicillin 250 mg/5 mL. The dose is 500 mg every 8 hours for 10 days. How many milliliters of the suspension are required?

10 points

A. 100 mL

B. 150 mL

C. 300 mL

D. 450 mL

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How many milligrams of drug are in 2.5 mL of a solution labeled 1:200?

10 points

A. 0.0125 mg

B. 0.125 mg

C. 12.5 mg

D. 125 mg

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A solution contains 5 g of drug in 250 mL. What is the percentage strength (w/v) of the solution?

10 points

A. 1%

B. 2%

C. 3%

D. 5%

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Convert a 5% (w/v) solution of a drug into mg/mL.

10 points

A. 0.5 mg/mL

B. 5 mg/mL

C. 50 mg/mL

D. 500 mg/mL

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How many milliliters of a 10% w/v stock solution are required to prepare 500 mL of a 2% solution?

10 points

A. 50 mL

B. 100 mL

C. 150 mL

D. 200 mL

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A child weighing 20 kg is prescribed ceftriaxone 100 mg/kg/day in two divided doses. How much ceftriaxone should the child receive per dose?

10 points

A. 500 mg

B. 1 g

C. 2 g

D. 2.5 g

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How many grams of sodium chloride are needed to prepare 500 mL of a 0.9% NaCl solution?

10 points

A. 0.45 g

B. 0.9 g

C. 1.8 g

D. 4.5 g

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A hospital pharmacy receives an order for 500 mL of 5% (w/v) glucose solution. The stock solution is 70% glucose. How many milliliters of the stock solution are required to prepare the order?

10 points

A. 30.7 mL

B. 35.7 mL

C. 50.0 mL

D. 71.4 mL

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A prescription calls for a 1:10,000 epinephrine solution. How many milligrams of epinephrine are in 20 mL of this solution?

10 points

A. 0.02 mg

B. 0.2 mg

C. 2 mg

D. 20 mg

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A child weighing 15 kg is prescribed acetaminophen 15 mg/kg/dose every 6 hours. The oral suspension is 160 mg/5 mL. How many milliliters should the child receive per dose?

10 points

A. 2.5 mL

B. 5 mL

C. 7.5 mL

D. 10 mL

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A pharmacist has 250 mg tablets of metformin. A prescription requires 1 g to be taken twice daily. How many tablets are needed for a 30-day supply?

10 points

A. 120 tablets

B. 180 tablets

C. 240 tablets

D. 360 tablets

Clear selection

A TPN order requires 75 g of dextrose. The stock solution is 70% dextrose (w/v). How many milliliters of the stock solution are required to meet the dextrose need?

10 points

A. 50 mL

B. 75 mL

C. 107 mL

D. 150 mL

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A pharmacist is preparing a pediatric dose of gentamicin. The dose is 2 mg/kg for a child weighing 12 kg. The stock concentration is 40 mg/mL. How many milliliters should be administered?

10 points

A. 0.3 mL

B. 0.5 mL

C. 0.6 mL

D. 1.2 mL

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A physician prescribes 1 L of lactated Ringer's to infuse at 125 mL/hour. How many hours will it take to complete the infusion?

10 points

A. 6 hours

B. 8 hours

C. 10 hours

D. 12 hours

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How many milliliters of a 1% lidocaine solution are needed to prepare 250 mL of a 0.2% solution?

10 points

A. 20 mL

B. 50 mL

C. 100 mL

D. 200 mL

Clear selection

A prescription requires 200 mL of a 1:1,000 solution. How many grams of solute are in this preparation?

10 points

A. 0.2 g

B. 2 g

C. 20 g

D. 200 g

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A patient is receiving heparin at a rate of 12 units/kg/hour. The patient weighs 70 kg, and the IV bag contains 25,000 units of heparin in 500 mL. What is the infusion rate in mL/hour?

10 points

A. 12 mL/hour

B. 16.8 mL/hour

C. 20 mL/hour

D. 33.6 mL/hour

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A pharmacist is compounding a topical cream requiring 5 g of hydrocortisone 2.5%. The hydrocortisone powder is available as 100% strength. How many grams of powder should be used?

10 points

A. 0.1 g

B. 0.25 g

C. 0.5 g

D. 1.25 g

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An IV order calls for 2 g of cefazolin to be diluted in 50 mL normal saline and infused over 30 minutes. What is the infusion rate in mL/hour?

10 points

A. 50 mL/hour

B. 75 mL/hour

C. 100 mL/hour

D. 150 mL/hour

Clear selection

How many milliliters of a 1:2,000 solution are required to provide 5 mg of the active ingredient?

10 points

A. 1 mL

B. 2.5 mL

C. 5 mL

D. 10 mL

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